uMMC Features

Features 
Card TypesSD/miniSD/microSD
Card FormatMMC/SD/SDHC/SDXC
Card Sizes8MB → 2TB
File SystemsFAT12
FAT16
FAT32
Control InterfaceTTL Serial
Serial Interface8 bits, no parity, 1 stop bit
Serial Speeds2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800 bps
Operating
Temperature
-40°C to +85°C
Physical Size2x1.25 inches (51x32 mm)
Power Source3 → 5 Volts
Chipset AvailableYes - 44 lead TQFP, or 44 pad QFN